10109621 has 4 divisors (see below), whose sum is σ = 10382892. Its totient is φ = 9836352.

The previous prime is 10109597. The next prime is 10109623. The reversal of 10109621 is 12690101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4468996 + 5640625 = 2114^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 10109621 - 2⁶ = 10109557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10109593 and 10109602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10109623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136580 + ... + 136653.

It is an arithmetic number, because the mean of its divisors is an integer number (2595723).

Almost surely, 2^10109621 is an apocalyptic number.

It is an amenable number.

10109621 is a deficient number, since it is larger than the sum of its proper divisors (273271).

10109621 is an equidigital number, since it uses as much as digits as its factorization.

10109621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273270.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 10109621 is about 3179.5630202907. The cubic root of 10109621 is about 216.2278474195.

Adding to 10109621 its reverse (12690101), we get a palindrome (22799722).

The spelling of 10109621 in words is "ten million, one hundred nine thousand, six hundred twenty-one".